Javafx TableView Scroll not working - javafx

Guys I am trying to make an application involving a tableview. I want my program to run a certain method when the user is scrolling, stopped scrolling, or scrolled to the bottom of the page in the TableView. I was trying to the use the on Scroll, on Scroll Finished in Scene Builder, but nothing happens.
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I also need that when those chat boxes occupy the entire space, something similar to the image attached is shown, a button where the first boxes that you select come out so that you can select and resume that conversation. In the following link I have my application working. Could someone help me? The application code and the demo can see it here.
The image of the behavior that I want is the following:

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I would like to create context menu in my project. On android it's called PopupMenu. On click of button, I have to show the popup with 3 rows and it's clickable event. How I can implement this in my code? Example of this menu here:
http://www.javatpoint.com/images/androidimages/popup2.png
The Xamarin.Forms way to handle this is to call DisplayActionSheet() on the Page.
It's not exactly a popup, but on the other hand it has better chances to be fully displayed and visible on screen if your view can scroll.

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Thanks,
Chris.
I think I've solved this now. I believe there was supposed to be three layers: (from top to bottom; top towards user) scroll view, view (), and view controller. Somehow I lost the view in the middle () and this was not letting me resize the scroll view.

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Flex 4 - creating pop-up without disabling background / drag image without mouseup trigger?

Sorry to bother you, but I was hoping you could help me. We are currently building a new web site and have run into some issues with our programmer. I am trying to do some research to see if we can find a way for my issue to be solved so that I can let my programmer know.
First issue:
Go here: http://tinyurl.com/276we3f
At the pop-up just enter some example text.
Now, when you hover over any text boxes on the left of the card, you will see that the text boxes become highlighted with a border. If you click in a text box, a properties pop-up appears that allows you to change the font, color, alignment, etc. When you click close, it will take you back to the product and will highlight the text. I want the user to be able to click anywhere within a text box to type new text. For example, in the bottom text box, where it says "join us to celebrate", the user should be able to click anywhere in that text to change the wording. They might want it to say "join me to celebrate" instead of "join us to celebrate". However, if they click next to the word "us" so that they can change it....the pop-up appears.
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Also, is there a way to be able to click anywhere in the text box to edit just certain words or letters?
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If you click on "Click to add photo", you will see a pop-up appear that allows you to upload an image, edit it, etc. After uploading the image, I want the user to be able to move the image around with their mouse by dragging it and positioning it in the exact spot that they want it in. We also have the arrows where they can click the up, down, left or right arrow in the image editor pop-up....but I would like for them to be able to drag the image with their mouse as well. We know how to enable dragging of the image. However, the problem occurs when the user releases the mouse button. On the mouseup when the user is done dragging....the pop-up will appear since the pop-up is triggered by the release of the mouse button.
Does that make sense?
Sorry for the long message and THANKS SO MUCH for your help!
For the first part of your question, when showing the dialog box for the properties of the text area, you can pop it up as a non-modal window. This means the properties dialog will show but will not lock out the rest of the UI, enabling the user to change the text however they like. It also means the background does not blur/grey out. To pop up a window in a non-modal state, call PopUpManager.createPopUp (or PopUpManager.addPopUp) with the third parameter (modal) set to false.
For the second issue, set a member variable such as "isDragging" to true when you detect that the user is dragging the image around. Then on mouse up, only display the pop up if isDragging is false.
Hope that helps.

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